So I've decide to hook the thing on the bread board. for one simple reason. There is so much to know about the whole sound card and the MCA standard, that there is a good probability that the required library to make the sound card run will not fit in the 256k available.

So I've made a neeter version of the PDF i listed above into 6 JPG that contain the important information.

So let's get started.

Cause of the 4 pictures limitation the last 2 pictures will be send in the next post

Oh! By the way, I will be using the Y3014B that fortunately was also on socket on the sound card. I can't find the PDF yet, but i will make some circuit picture up in the worst case scenario that the pdf does not exist.

It's a 8 pin dip chip so it should not require much work to figure out what is what since it's hooked straight to the YM3812.

Ok so that it for me for the rest of the after noon, working at 14:00 work some more tonight on this.

See ya.

As we fight our way northward into the great unknown, only that one thing remains certain...

justinbacle

Hi there, I do not know if you are still working on this project. I am working on a similar project, a Synth using the YM3812.

I got the documentation, the first step is to generate the clock signal. The YM3812 clock being 3.58 MHz, you can use a bit of the following schematic to generate that.It uses a 3.579 MHz cristal and a bunch of 74LS04 "No" gates.

My main problem, is that I never worked with registers before so I do not really know what to expect.

justinbacle

when looking at the documentation and beginning my wiring, I began to ask myself some questions.

The signals ?SY (Clock), SH (Sync. Signal) and MO (Digital Output) are supposed to go to "the external D/A convertor unit", but no references are given in the small documentation we have. Looking on the internet, i found the the D/A Chip is supposed to be a Yamaha YM3014B. Can someone with an AdLib card confirm that ? (I just have the bare YM3812 chip myself). Also no reference of the YM3812 on the YM3014B's documentation.

Also, the clock of the YM3014B is (min/typ/max : 0.65/2/3.2 Mhz) which is quite a wide range of frequences, I wonder what is the impact of changing the clock frequency.And the Analog Out of the YM3014B requires a Buffer Operational Amplifier, is it just needed for electrical insulation ?

PS : I did not specify, but I am not an electrical engineer (as you would have guessed) but a young engineer in acoustics and vibration. I am getting myself onto this project because I want to build my unique synth.